<html>
<head>
  <title>Bluetooth Config</title>
  <script type="text/javascript">
    function openBluetoothConfig() {
      if (window.flutter_inappwebview) {
        window.flutter_inappwebview.callHandler('openBluetoothConfig');
      } else {
        alert('Flutter bridge is not available.');
      }
    }
  </script>
</head>
<body>
  <button onclick="openBluetoothConfig()">Open Bluetooth Config</button>
</body>
</html>
